int Device::GetInterfaceStringIndex(usb::DeviceDescriptorPtr desc, u8 number)
{
static const u16 DT_INTERFACE = 4;
ByteArray descData = desc->GetDescriptor();
HexDump("descriptor", descData);
size_t offset = 0;
while(offset < descData.size())
{
u8 len = descData.at(offset + 0);
u8 type = descData.at(offset + 1);
if (len < 2)
throw std::runtime_error("invalid descriptor length");
if (type == DT_INTERFACE && len >= 9 && descData.at(offset + 2) == number)
return descData.at(offset + 8);
offset += len;
}
throw std::runtime_error("no interface descriptor found");
}
static inline GccArguments::Lang guessLang(const Path &fullPath)
{
ByteArray compiler = fullPath.fileName();
ByteArray c;
int dash = compiler.lastIndexOf('-');
if (dash >= 0) {
c = ByteArray(compiler.constData() + dash + 1, compiler.size() - dash - 1);
} else {
c = ByteArray(compiler.constData(), compiler.size());
}
if (c.size() != compiler.size()) {
bool isVersion = true;
for (int i=0; i<c.size(); ++i) {
if ((c.at(i) < '0' || c.at(i) > '9') && c.at(i) != '.') {
isVersion = false;
break;
}
}
if (isVersion) {
dash = compiler.lastIndexOf('-', dash - 1);
if (dash >= 0) {
c = compiler.mid(dash + 1, compiler.size() - c.size() - 2 - dash);
} else {
c = compiler.left(dash);
}
}
}
GccArguments::Lang lang = GccArguments::NoLang;
if (c.startsWith("g++") || c.startsWith("c++")) {
lang = GccArguments::CPlusPlus;
} else if (c.startsWith("gcc") || c.startsWith("cc")) {
lang = GccArguments::C;
}
return lang;
}
Path Process::findCommand(const ByteArray& command)
{
if (command.isEmpty() || command.at(0) == '/')
return command;
const char* path = getenv("PATH");
if (!path)
return Path();
bool ok;
const List<ByteArray> paths = ByteArray(path).split(':');
for (List<ByteArray>::const_iterator it = paths.begin(); it != paths.end(); ++it) {
const Path ret = Path::resolved(command, *it, &ok);
if (ok && !access(ret.nullTerminated(), R_OK | X_OK))
return ret;
}
return Path();
}
bool TarReader::readHeader(Ref<ArchiveEntry> *nextEntry)
{
if (!data_) data_ = ByteArray::create(512);
*nextEntry = ArchiveEntry::create();
ByteArray *data = data_;
ArchiveEntry *entry = *nextEntry;
if (source_->readAll(data) < data->count()) return false;
i_ += data->count();
bool eoi = true;
for (int i = 0; i < data->count(); ++i) {
if (data->byteAt(i) != 0) {
eoi = false;
break;
}
}
if (eoi) return false;
bool ustarMagic = false;
bool gnuMagic = false;
bool readAgain = true;
while (readAgain) {
readAgain = false;
String magic;
data->scanString(&magic, "", 257, 263);
ustarMagic = (magic == "ustar");
gnuMagic = (magic == "ustar ");
unsigned checksum, probesum;
data->scanNumber(&checksum, 8, 148, 156);
entry->type_ = data->at(156);
if (entry->path_ == "") data->scanString(&entry->path_, "", 0, 100);
if (entry->linkPath_ == "") data->scanString(&entry->linkPath_, "", 157, 257);
probesum = tarHeaderSum(data);
if (checksum != probesum)
throw BrokenArchive(i_ - data->count(), Format("Checksum mismatch (%% != %%), path = \"%%\"") << oct(checksum, 6) << oct(probesum, 6) << entry->path());
if (gnuMagic) {
while ((entry->type_ == 'K' || entry->type_ == 'L') /*&& entry->path_ == "././@LongLink"*/) {
data->scanNumber(&entry->size_, 8, 124, 136);
String longPath = source_->readAll(entry->size_);
if (longPath->count() < entry->size_)
throw BrokenArchive(i_, "Expected GNU @LongLink data");
i_ += entry->size_;
if (entry->size() % 512 != 0) {
i_ += source_->skip(512 - entry->size() % 512);
}
if (longPath->byteAt(longPath->count() - 1) == 0)
longPath->truncate(longPath->count() - 1);
if (entry->type_ == 'K') entry->linkPath_ = longPath;
else if (entry->type_ == 'L') entry->path_ = longPath;
if (source_->readAll(data) < data->count())
throw BrokenArchive(i_, "Expected GNU @LongLink header");
i_ += data->count();
entry->type_ = data->at(156);
readAgain = true;
}
}
}
if (ustarMagic || gnuMagic) {
String prefix;
data->scanString(&entry->userName_, "", 265, 297);
data->scanString(&entry->groupName_, "", 297, 329);
if (!gnuMagic) {
data->scanString(&prefix, "", 345, 500);
if (prefix != "") entry->path_ = prefix + "/" + entry->path_;
}
}
data->scanNumber(&entry->mode_, 8, 100, 108);
data->scanNumber(&entry->userId_, 8, 108, 116);
data->scanNumber(&entry->groupId_, 8, 116, 124);
data->scanNumber(&entry->size_, 8, 124, 136);
data->scanNumber(&entry->lastModified_, 8, 136, 148);
if (entry->type() == 0 && entry->path()->count() > 0) {
if (entry->path()->at(entry->path()->count() - 1) == '/')
entry->type_ = ArchiveEntry::Directory;
}
entry->offset_ = i_;
return true;
}
